Adam Dachis

We all have an ego that can get in the way of our work, and it sometimes masquerades as confidence. If you don't know the difference, you can make your life a lot harder without ever realizing it.

Todd Henry, writing for the 99u, explains:

There is a vast chasm between confidence in your abilities, and an over-inflated ego. Ego says “I can do no wrong”, whereas confidence says “I can get this right.” Confidence says “I’m valuable” while ego says “I’m invaluable.” This is a critical difference in mindset. Be aware when you are generally contributing and when you are simply trying to protect the status quo. Losing some of your “turf” may seem scary, but it’s really an opportunity to stay one step ahead.

While it might seem to make sense to make yourself invaluable and horde the work that makes you look good, it's the ability to work with others and do well at any task that gives you value.